# SOME DESCRIPTIVE TITLE # Copyright (C) YEAR Free Software Foundation, Inc. # This file is distributed under the same license as the PACKAGE package. # FIRST AUTHOR , YEAR. # #, fuzzy msgid "" msgstr "" "Project-Id-Version: PACKAGE VERSION\n" "POT-Creation-Date: 2014-01-01 16:50+0100\n" "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" "Last-Translator: FULL NAME \n" "Language-Team: LANGUAGE \n" "Language: \n" "MIME-Version: 1.0\n" "Content-Type: text/plain; charset=UTF-8\n" "Content-Transfer-Encoding: 8bit\n" #. type: One-char language identifier #: train703.languagecode:1 #, no-wrap msgid "E" msgstr "P" #. type: Title-text #: train703/scene.txt:1 #, no-wrap msgid "train703:Remote control #5" msgstr "train703:Zdalna kontrola #5" #. type: Resume-text #: train703/scene.txt:2 #, no-wrap msgid "train703:Remote control a bot without using an information exchange post by storing the orders." msgstr "train703:Zdalnie kontroluj robota bez użycia stacji przekaźnikowej zachowując rozkazy" #. type: ScriptName-text #: train703/scene.txt:3 #, no-wrap msgid "train703:Remote5" msgstr "train703:Zdalnie5" #. type: \b; header #: train703-help/tremote5.txt:1 #, no-wrap msgid "Exercise" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:3 #, no-wrap msgid "Remote control a slave robot without using an information exchange post. The robot should pass over the 6 blue crosses. " msgstr "" #. type: Plain text #: train703-help/tremote5.txt:5 #, no-wrap msgid "The two main actors of this exercise are:\n" msgstr "" #. type: Bullet: '1)' #: train703-help/tremote5.txt:5 #, no-wrap msgid "The wheeled grabber without an energy pack and therefore immobile. This is the master you should program so it will transmit orders to the slave." msgstr "" #. type: Bullet: '2)' #: train703-help/tremote5.txt:6 #, no-wrap msgid "The slave practice bot which is already programmed and just waits for orders from the master." msgstr "" #. type: Plain text #: train703-help/tremote5.txt:9 #, no-wrap msgid "The orders shall be stored, so the master will be able to transmit several orders without waiting for each order being processed. We use an array for this purpose." msgstr "" #. type: \b; header #: train703-help/tremote5.txt:10 #, no-wrap msgid "The slave" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:12 #, no-wrap msgid "First of all we must understand how the program of the slave works. The class order contains two members: m_type is the order to execute (move or turn) and m_param is the distance to move or the rotation angle¦:" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:14 #, no-wrap msgid "public class order" msgstr "" #. type: \s; block (usually verbatim code) #: train703-help/tremote5.txt:18 #, no-wrap msgid "" "{\n" "\tint m_type;\n" "\tfloat m_param;\n" "}" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:20 #, no-wrap msgid "A second class exchange contains the mechanism for exchanging the orders. We declare a static class member m_fifo which will contain the list of orders to be executed. The word static insures that the member m_fifo is shared between all instances of the class exchange." msgstr "" #. type: Plain text #: train703-help/tremote5.txt:22 #, no-wrap msgid "{" msgstr "" #. type: \s; block (usually verbatim code) #: train703-help/tremote5.txt:23 #, no-wrap msgid "\tstatic private order m_fifo[] = null;" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:25 #, no-wrap msgid "The put method will be used by the master robot for transmitting an order. The order will simply be added at the end of the m_fifo array:" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:27 #, no-wrap msgid "\tsynchronized void put(order a)" msgstr "" #. type: \s; block (usually verbatim code) #: train703-help/tremote5.txt:30 #, no-wrap msgid "" "\t{\n" "\t\tm_fifo[sizeof(m_fifo)] = a;\n" "\t}" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:32 #, no-wrap msgid "Another method get will be used by the slave to retrieve the orders. This method returns the order to be executed. If the list is empty, null will be returned and the robot must wait for more orders. Otherwise the first order in the list must be returned and the remaining orders must be \"scrolled up\". As an array can not be \"shortened\" we use a temporary array copy¦:" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:34 #, no-wrap msgid "\tsynchronized order get()" msgstr "" #. type: \s; block (usually verbatim code) #: train703-help/tremote5.txt:46 #, no-wrap msgid "" "\t{\n" "\t\tif ( sizeof(m_fifo) == 0 ) return null;\n" "\n" "\t\torder a = m_fifo[0];\n" "\t\torder copy[] = null;\n" "\t\tfor ( int i=1 ; iexchange called list. We put () after the word list in order to create an instance of the class exchange." msgstr "" #. type: Plain text #: train703-help/tremote5.txt:50 #, no-wrap msgid "extern void object::Slave5( )" msgstr "" #. type: \s; block (usually verbatim code) #: train703-help/tremote5.txt:53 #, no-wrap msgid "" "{\n" "\texchange list();\n" "\torder todo;" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:55 #, no-wrap msgid "The outer while loop lasts for ever. The inner while loop waits for an order by using the get method of the exchange class. As soon as get returns a value different from null, the while loop stops." msgstr "" #. type: Plain text #: train703-help/tremote5.txt:57 #, no-wrap msgid "\twhile ( true )" msgstr "" #. type: \s; block (usually verbatim code) #: train703-help/tremote5.txt:64 #, no-wrap msgid "" "\t{\n" "\t\twhile ( true )\n" "\t\t{\n" "\t\t\ttodo = list.get();\n" "\t\t\tif ( todo != null ) break;\n" "\t\t\twait(1);\n" "\t\t}" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:66 #, no-wrap msgid "Now we have received the order in the todo variable. All we have to do is execute it:" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:68 #, no-wrap msgid "\t\tif ( todo.m_type == 1 )" msgstr "" #. type: \s; block (usually verbatim code) #: train703-help/tremote5.txt:81 #, no-wrap msgid "" "\t\t{\n" "\t\t\tmove(todo.m_param);\n" "\t\t}\n" "\t\telse if ( todo.m_type == 2 )\n" "\t\t{\n" "\t\t\tturn(todo.m_param);\n" "\t\t}\n" "\t\telse\n" "\t\t{\n" "\t\t\tmessage(\"Unknown order\");\n" "\t\t}\n" "\t}\n" "}" msgstr "" #. type: \b; header #: train703-help/tremote5.txt:82 #, no-wrap msgid "The master" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:84 #, no-wrap msgid "In the master we write a function called SendOrder which will send an order to the slave:" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:86 #, no-wrap msgid "void object::SendOrder(float order, float param)" msgstr "" #. type: \s; block (usually verbatim code) #: train703-help/tremote5.txt:94 #, no-wrap msgid "" "{\n" "\texchange list();\n" "\torder todo();\n" "\t\n" "\ttodo.m_type = order;\n" "\ttodo.m_param = param;\n" "\tlist.put(todo);\n" "}" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:96 #, no-wrap msgid "Now the main program of the master is very simple:" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:98 #, no-wrap msgid "extern void object::Remote5( )" msgstr "" #. type: \s; block (usually verbatim code) #: train703-help/tremote5.txt:109 #, no-wrap msgid "" "{\n" "\tSendOrder(1, 20); // move(20);\n" "\tSendOrder(2, 90); // turn(90);\n" "\tSendOrder(1, 20); // move(20);\n" "\tSendOrder(2, 90); // turn(90);\n" "\tSendOrder(1, 10); // move(10);\n" "\tSendOrder(2, 90); // turn(90);\n" "\tSendOrder(1, 10); // move(10);\n" "\tSendOrder(2,-90); // turn(-90);\n" "\tSendOrder(1, 10); // move(10);\n" "}" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:111 #, no-wrap msgid " show these instruction at any time." msgstr "" #. type: \t; header #: train703-help/tremote5.txt:112 #, no-wrap msgid "See also" msgstr "" #. type: Plain text #: train703-help/tremote5.txt:113 #, no-wrap msgid "Controls and programming." msgstr ""